Ratan Peru | Sathyabama University (original) (raw)
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Papers by Ratan Peru
The laser polarization is a basic characteristic of CO 2 and solid-state lasers. The material's a... more The laser polarization is a basic characteristic of CO 2 and solid-state lasers. The material's absorptivity to laser is dependent upon the laser incident angle. Thus, the laser polarization can be utilized to control the bending angle by changing the laser incident angle during laser bending. The laser polarization is introduced into laser micro-bending, and an experimental system is established. Laser micro-bending process based on the characteristic of the laser polarization is realized. For uncoated stainless steel specimen, the bending angles acquired at bigger incident angles are bigger than those acquired at zero incident angles. The bending angles increase linearly with the increase of the incident angle when the incident angle changes from 60 • to 80 •. During laser multi-scan bending, the final bending angle no longer varies with the scanning number, and approximately equals to the complement angle of the incident angle when it approaches to the complement angle. By means of adjusting the laser incident angle and scanning velocity , unfinished and finishing laser bending can be realized to satisfy the forming efficiency and accuracy. The absolute error between the final bending angle and the expected angle is less than 0.1 •. Crown
Drafts by Ratan Peru
Physical Vapor Deposition (PVD) - surface coating technology used for decorative coating, tool co... more Physical Vapor Deposition (PVD) - surface coating technology used for decorative coating, tool coating, and other equipment coating applications.
The basic mechanism - an atom by atom transfer of material from the solid phase to the vapor phase and back to the solid phase, gradually building a film on the surface to be coated.
Books by Ratan Peru
The laser polarization is a basic characteristic of CO 2 and solid-state lasers. The material's a... more The laser polarization is a basic characteristic of CO 2 and solid-state lasers. The material's absorptivity to laser is dependent upon the laser incident angle. Thus, the laser polarization can be utilized to control the bending angle by changing the laser incident angle during laser bending. The laser polarization is introduced into laser micro-bending, and an experimental system is established. Laser micro-bending process based on the characteristic of the laser polarization is realized. For uncoated stainless steel specimen, the bending angles acquired at bigger incident angles are bigger than those acquired at zero incident angles. The bending angles increase linearly with the increase of the incident angle when the incident angle changes from 60 • to 80 •. During laser multi-scan bending, the final bending angle no longer varies with the scanning number, and approximately equals to the complement angle of the incident angle when it approaches to the complement angle. By means of adjusting the laser incident angle and scanning velocity , unfinished and finishing laser bending can be realized to satisfy the forming efficiency and accuracy. The absolute error between the final bending angle and the expected angle is less than 0.1 •. Crown
Physical Vapor Deposition (PVD) - surface coating technology used for decorative coating, tool co... more Physical Vapor Deposition (PVD) - surface coating technology used for decorative coating, tool coating, and other equipment coating applications.
The basic mechanism - an atom by atom transfer of material from the solid phase to the vapor phase and back to the solid phase, gradually building a film on the surface to be coated.